This statement is a misunderstanding of Powell 2016, which states:

At Nature, the median review time has grown from 85 days to just above 150 days over the past decade, according to Himmelstein's analysis.

However,

the median review time — the time between submission and acceptance of a paper — has hovered at around 100 days for more than 30 years.

So while the median review time at Nature has gone from 85 to 150 days, this is not the case for all journals. See also the related Tweet.